Four-horse equalizer.



' PATENTED JAN. 21, 1908.

0. & F. ZOELLER. FOUR HORSE EQUALIZER. APPLIOATION FILED UNE 6,1905.

Witnaawa I THE mmkrs PETERS 60., wAssmm'oN, n. c.

. UNITE l STATES ATNT orruoE.

FOUR-HORSE EQUALIZER.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed \Tune 6. 1905. Serial No. 263,959.

-To all whom it may concern:

Be it known that OSWALD ZoELLERand FREDERICK ZOELLER', residing at Hancock, in the county of Pottawattamie and State of Iowa, have invented certain new and useful Improvements in Four-Horse Equalizers; and we do hereby declare that the following is a full, clear, and exact description of the in vention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the ac companying drawings, which form a part of this specification.

Our invention relates to a new and useful improvement in four-horse equalizers, and our object is to provide a four-horse equalizer so constructed to overcome the side draft, so that each horse will pull an equal amount of load, which object we accomplish by means of the construction and arrangement of parts hereinafter described and finally pointed out in the claims.

In the accompanying drawings, Figure 1, shows a top lan View of our invention with portions bro (en away.

In carrying out the aim of our invention, we use the maintree members, A, and pivotally secured between and at one'end of the maintree members A, by means of the bolt 1, is the double tree 2, which is secured by means of the links 3, 3, to the single trees 4, 4. Pivotally secured by means of the bolt 5, to the opposite end of the maintree A, are the straps6, and secured to the forward end and between these straps 6, is the single tree 7. Secured between these straps by means of the pin 8, at their opposite or rear end is the roller 9, against which roller the bent end 10, of the pivotally supported bent lever B, Works back and forth. This end 10, of the pivotally supported bent lever B, is kept from working up and down by means of the straps 6, as the lever B, passes between the straps as clearly shown.

Pivotally secured to the end 11, of the pivotally supported bent lever B, by means of the bolt 20, are the connecting straps 21, which straps are pivotally secured at their opposite ends by means of the bolt 22, near one end of the curved equalizing lever 23, as shown. Pivotally secured by means of the bolt 24, to the long end of the curved equalizing lever 23, are the connecting straps 25,

' which straps in turn by means of the bolt 26, are secured between the maintree members I A. Pivotally secured to the opposite or Pivotally secured by means of the bolt 31,

to the offset end 32, of the draft lever 30, which is located in advance of the maintree A, are the connecting straps 33, which in turn by means of the bolt 34, are pivotally secured to the single tree 35. The opposite end 36, of the draft lever or bar 30, is pivotally held between the maintrees A, by means of the bolt 37, as clearly shown in the drawing.

Pivotally secured by means of the bolt 12, approximately intermediate of the end 11, of the pivotally supported bent lever B, are the connecting straps 13, which are, at one end pivotally secured to the clevis 14.

It will be observed that the opposite end of the straps 13, extend beyond the pivot point 12, as shown and are pivotally secured by means of the bolts 15, to one end of the connecting straps 16, the opposite end of said connecting straps 16, being secured by means of the bolt 17, to one end of the clevis 14, as clearly shown.

In securing the clevis to the plow beam, we use the ordinary clevises 18, which are secured to the plow beam C, and which clevises are secured to the clevis 14, by means of the bolt 19.

It will be observed that by using the cross connecting straps 25, and 28, two of which are secured to the draft lever or bar 30, and the other pair of straps pivotally supported between the main tree members A, all the heavy draft will be thrown upon the draft lever 30, at a point 29, and from the point 29, to the point 37, thus providing an equalizer whereby each horse will pull an equitable amount of the load.

When our equalizeris used in connection with sulky and walking plows, it is used as shown in Fig. 1., and when used in connection with gang plows and the like, the connecting straps 13, and 16, are discarded and the plow beam is then suitably secured approximately intermediate of the end 11, of the pivotally sup ported bent lever B.

In operation pulling force being exerted on each of the single trees it will be observed that the pull on tree 7, will be communicated to end 10, of lever B, it being noted that the greater leverage is obtained on B, by tree 7,

While the lesser leverage is obtained by trees A, and 35, which latter obtains the greatest possible leverage from lever 30, but which by virtue of the crossed straps 25, and 28, and

- the curved lever 23, which latter connects to end 11, of lever B, has its leverage so proportioned, by the location and assemblage of the parts, as to equally balance the additional leverage attained by tree 7. But beyond this since maintree A, is pivoted to straps 25, and the inner end of lever 30, and since the dou ble tree 2, is pivoted to maintree A, the pull of trees 4, 4-, on double tree 2, and thence to maintree A, plus the pull exerted on said main tree by lever 30, and by said parts to lever B, equals collectively the pull on lever B, by'tree 7. It will therefore be notedthat the entire pull on trees 4, 4, is communicated to tree A, and thereby to straps 25, and thence to lever B at its inner end. At the same time the pull on tree .35, is communicated in an opposite direction to tree A, as

- compared with the pull on A, by trees 4, 4,

which causes straps 28, to pull on lever 23, in

' an opposite direction to that which straps 25,

pull on the same, and tree 35, through lever 30, exerts a pull due to the leverage of lever 30,. in excess of the amount of that exerted by straps 25, thereby equalizing the draft. The lengthand location ofthe parts are necessarily so proportioned that the combined pull of trees 4, 4, and 35, on lever B, but equals that exerted on said lever by tree 7.

Side draft is prevented dueto the fact that the straps .25, and 28, cross one another and are each connected to lever 23, straps '28, connecting to lever 30, and straps 25, to main tree A. Thus by pulling on the trees 4, 4, and .35, the cross straps will draw against one another. its greatleverage throws the heavy draft on tree A.

Having thus described our said invention what weclaim as new and desire to secure by United States Letters Patent is 1. In a draft equalizer, in combination with the maintree, a bent draft lever on one side vof'the maintree pivoted at one end to said maintree and carrying a whifiietree at its free end, a curved equalizing lever on the opposite side of said maintree, a connection between one end of said curved lever and said maintree, a connection between the other end of said curved lever and an intermediate part of said draft lever, .a whiffletree pivoted to one end of said maintree, and a connection between saidlast named whiffletree and-said curved lever.

2. In combination with a maintree, a draft lever pivoted thereto and carrying .a Whittle tree extending on one side of said maintree, a curved lever on the opposite side of said maintree, a connection between one end of said curved lever and said maintree, a connection between the opposite end of said The lever 30; due to curved lever and an intermediate part of said draft lever, a pivotally su ported bent lever connected to said curve lever, a second whiffletree, and a connection between said last named whiffletree and said bent lever.

3. In a draft equalizer, the combination with the main trees or evener bars having a draft lever pivoted there between and near one end thereof, said lever extending approximately parallel with aforesaid maintrees or evener bars and having one end thereof offset and located in advance of the maintrees or evener bars and a whiffletree connected to the offset end of said draft bar; connecting straps extending rearward from said draft lever and main trees or evener bars and crossing one another and being pivotally secured at their opposite end to a curved equalizing lever, and connecting straps extending rearward from near one end of said curved equalizing lever and pivotally secured at their opposite ends to one end of the pivotally supported bent lever which lies approximately parallel in the rear of aforesaid maintrees and one end thereof passing between a pair of straps which are pivotally secured near the outer end of the maintrees, whiflletrees secured to one end of said straps, and double-tree secured to the opposite end of said maintrees, and whiflletrees secured to each end of said doubletree.

4. In a four-horse equalizer, the combination with a maintree, of a double tree pivoted to said maintree at one end, whiffletrees connected to the ends of said doubletree, a bent draft lever pivoted to said maintree and adjacent the inner 'end of aforesaid double tree, a whiffletree connected to the opposite end of said .bent draft lever, a curved equalizing lever, connecting straps pivoted to the ends of said curved e ualizing lever and crossing each other an pivotally secured at their other ends to said maintree and to said draft lever respectively, straps pivotally secured to one end of said curved e ualizing lever, a pivotally supported bent fever, the other ends of said last named connecting straps being secured to one end of said bent lever which lies to the rear and parallel of said maintree, a pair of straps pivoted to the opposite end of said maintree, a whiffletree pivoted to one end of said. straps, a roller pivotally held between and at the opposite end of said straps, between which straps passone end of the said pivotally supported bent lever, which is adapted to work back and forth on the periphery of aforesaid roller.

5. In a four horse equalizer, the combination with a maintree, of a doubletree.

doubletree, a whiffletree connected to the opposite end of said bent draft lever, a curved equalizing lever, connecting straps pivoted to the ends of said equalizing lever and crossing each other and pivotally secured at their other ends to said maintree and to said draft lever respectively; straps pivotally secured to one end of said curved equalizing lever, a pivotally supported bent lever, one of the ends of said last named connecting straps being secured to one end of said bent lever which lies to the rear and parallel to said maintree, elongated straps pivoted to said maintree, a whiffletree pivoted to one end of said elongated straps, a roller pivotally held between and at the opposite end of said elongated straps, between which elongated straps passes one end of said pivotally sup orted bent lever, which is adapted to WOIl; back and forth on the periphery of said roller, a pair of connecting straps pivotally secured near one end of aforesaid pivotally supported bent lever, a second pair of connecting straps connected to the forward ends of said first named pair straps, both pairs of straps extending rearward at an angle to said bent lever and pivotally secured to a clevis secured to the plow beam.

6. In a four-horse equalizer, comprising of a pair of maintrees, a double-tree pivotally secured at one end of said maintrees,

whiffletrees secured to the ends of said doubletree, by means of links, a pair of straps pivotally secured to the opposite end' of aforesaid maintree, a roller secured to one end of said straps, a smgletree secured to the op osite end of said straps, one end of a pivota ly supported bent lever passing between said straps and working against the periphery of said roller; and connecting straps pivotally secured to the opposite end of aforesaid pivotally supported bent lever, a curved equalizing lever secured near one end to said connecting strap, connecting stra s secured to each end of the curved equa izing lever, said straps crossing one another and being pivotally secured to the maintree and the pivotally supported end of the curved draft lever respectively; one end of said curved draft lever being provided with pivotally held straps which are secured at tie opposite end to a whiffletree, connecting straps pivotally secured to aforesaid pivotally supported bent lever one end being pivotally secured-to a suitable clevis the opposite end thereof being pivotally secured to said clevis, and means for securing said clevis to the clevises of a plow beam.

7. In combination with a maintree, a lever pivoted thereto and carrying a whiffletree, a second Whifiietree connected to said maintree, and equalizing means connected to said lever and to the inner end of said maintree and to said second whifiletree.

In testimony whereof we affix our signature in presence of two witnesses.

OSWALD ZOELLER. FREDERICK ZOELLER.

Witnesses:

W. W. MoRoRY, F. A. NASH. 

